![]() ![]() Then in order to solve these two problems, we try to figure out a better trajectory that can minimize the use of fuel with our careful calculation. Also to be practical, fuel is another serious problem, which means the limited size of the aircraft restricted the amount of fuel carried. When the detector approaches Mars, a slight deviation in the orbital calculation will cause amplified error enough to pass the planet. The key concerns of launching process are the calculation of the track and the unknown accidents. In the last century, a total of thirty-three detectors were launched worldwide, but only 9 of them were completely successful. Since the Soviet Union launched its first Mars probe in 1960, 46 missions have been launched around the world, with less than a 45 percent success rate. However, the high risk of sending the probes from the Earth to Mars is a big obstacle. With the attraction of this precious red planet, we do want to learn more about it. Radar evidence of subglacial liquid water on Mars found by the MARSIS instrument provided strong support to the importance of exploring Mars. ![]() In recent years, people increasingly considered Mars as another habitable planet, because of the environmental degradation on the earth and the evidence found on Mars. Hall discovered two small satellites of Mars-Phobos and Phobos. With the idea of “artificial canals” on the surface of Mars in 1877 and the same year, A. Moreover, almost all of Kepler’s theories were based on observations of Mars for eighteen years. “From then on, natural science liberated from theology” (Copernicus, 1543). ![]() Finding retrograde motion of Mars not only improved Ptolemy’s geocentric theory, but also supported the heliocentric theory of Copernicus. Since ancient times, “Mars has fascinated mankind”. Mars, the closest planet to earth, has a lot in common with and has long been exploring. ![]()
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